WO2022153663A1 - 表示装置 - Google Patents
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- WO2022153663A1 WO2022153663A1 PCT/JP2021/042291 JP2021042291W WO2022153663A1 WO 2022153663 A1 WO2022153663 A1 WO 2022153663A1 JP 2021042291 W JP2021042291 W JP 2021042291W WO 2022153663 A1 WO2022153663 A1 WO 2022153663A1
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- pixel
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1334—Constructional arrangements; Manufacturing methods based on polymer dispersed liquid crystals, e.g. microencapsulated liquid crystals
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
- G02F1/133509—Filters, e.g. light shielding masks
- G02F1/133512—Light shielding layers, e.g. black matrix
-
- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
- G02F1/1336—Illuminating devices
- G02F1/133615—Edge-illuminating devices, i.e. illuminating from the side
-
- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1339—Gaskets; Spacers; Sealing of cells
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1343—Electrodes
- G02F1/134309—Electrodes characterised by their geometrical arrangement
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
- G02F1/133524—Light-guides, e.g. fibre-optic bundles, louvered or jalousie light-guides
Definitions
- An embodiment of the present invention relates to a display device.
- a liquid crystal layer having a first translucent substrate, a second translucent substrate, a polymer-dispersed liquid crystal display enclosed between the first translucent substrate and the second translucent substrate, and a liquid crystal layer.
- a display device including a first translucent substrate and at least one light emitting unit arranged to face at least one side surface of the second translucent substrate is described.
- An object of the embodiment is to provide a display device capable of suppressing deterioration of display quality.
- the display device includes a first substrate including a first transparent substrate, a plurality of pixel electrodes arranged on the first transparent substrate, a second transparent substrate having a side surface, and the plurality of pixel electrodes.
- a second substrate having a common electrode facing each other, a seal formed in a rectangular frame shape and adhering the first substrate and the second substrate, and the first substrate and the second substrate.
- a liquid crystal layer surrounded by a seal and containing a polymer-dispersed liquid crystal display and a light emitting module arranged along the side surface thereof are provided, and the seal sandwiches the first portion along the side surface and the liquid crystal layer.
- the liquid crystal layer has a second portion facing the first portion, an injection port formed in the second portion, and a filler filled in the injection port, and the liquid crystal layer has an image in a plan view. Is arranged over a display area for displaying, a first area between the display area and the first portion, and a second area between the display area and the second portion, and the first The first width of the region is larger than the width of the second region.
- the embodiment it is possible to provide a display device capable of suppressing deterioration of display quality.
- FIG. 1 is a plan view showing an example of the display device DSP of the embodiment.
- FIG. 2 is a plan view of a region including the first region A1 shown in FIG.
- FIG. 3 is a plan view of a region including the second region A2 shown in FIG.
- FIG. 4 is a plan view of a region including the third region A3 and the fourth region A4 shown in FIG.
- FIG. 5 is a plan view showing an example of the pixel PX.
- FIG. 6 is a plan view showing an example of the first pixel electrode PE1 arranged in the pixel PX shown in FIG.
- FIG. 7 is a plan view showing an example of the switching element SW shown in FIG.
- FIG. 8 is a cross-sectional view showing an example of the first substrate SUB1 along the line AB shown in FIG.
- FIG. 9 is a cross-sectional view showing an example of the first substrate SUB1 along the CD line shown in FIG. 7.
- FIG. 10 is a plan view showing an example of the dummy pixel DP.
- FIG. 11 is a plan view showing an example of the second pixel electrode PE2 arranged in the dummy pixel DP shown in FIG.
- FIG. 12 is a cross-sectional view of the first substrate SUB1 including the contact hole CH11 shown in FIG.
- FIG. 13 is a perspective view showing an example of the light emitting module 100 shown in FIG.
- FIG. 14 is a perspective view showing a state in which the light emitting module 100 shown in FIG. 13 is arranged on the display panel PNL.
- FIG. 15 is a plan view showing the state of propagation of the light emitted from the light emitting element 110.
- FIG. 16 is a cross-sectional view of the display device DSP.
- FIG. 1 is a plan view showing an example of the display device DSP of the present embodiment.
- the first direction X, the second direction Y, and the third direction Z are orthogonal to each other, but may intersect at an angle other than 90 degrees.
- the first direction X and the second direction Y correspond to the directions parallel to the main surface of the substrate constituting the display device DSP, and the third direction Z corresponds to the thickness direction of the display device DSP.
- viewing the XY plane defined by the first direction X and the second direction Y is referred to as a plan view.
- the display device DSP includes a display panel PNL, a wiring board 1, an IC chip 2, and a light emitting module 100.
- the display panel PNL includes a first substrate SUB1, a second substrate SUB2, a liquid crystal layer LC including a polymer-dispersed liquid crystal, and a seal SE.
- the first substrate SUB1 and the second substrate SUB2 are formed in a flat plate shape along an XY plane.
- the first substrate SUB1 and the second substrate SUB2 are superimposed in a plan view.
- the region on which the first substrate SUB1 and the second substrate SUB2 overlap includes a display region DA for displaying an image.
- the first substrate SUB1 includes a first transparent substrate 10
- the second substrate SUB2 includes a second transparent substrate 20.
- the first transparent substrate 10 has side surfaces 101 and 102 along the first direction X and side surfaces 103 and 104 along the second direction Y.
- the second transparent substrate 20 has side surfaces 201 and 202 along the first direction X and side surfaces 203 and 204 along the second direction Y.
- the side surfaces 102 and 202, the side surfaces 103 and 203, and the side surfaces 104 and 204 are superposed, respectively, but they are not necessarily superposed.
- the side surface 201 does not overlap the side surface 101 and is located between the side surface 101 and the display area DA.
- the first substrate SUB1 has an extension portion Ex between the side surface 101 and the side surface 201. That is, the extension portion Ex corresponds to a portion of the first substrate SUB1 that extends in the second direction Y from the portion that overlaps with the second substrate SUB2, and does not overlap with the second substrate SUB2.
- the display panel PNL is formed in a rectangular shape extending in the first direction X. That is, the side surfaces 101 and 102 and the side surfaces 201 and 202 are side surfaces along the long side of the display panel PNL, and the side surfaces 103 and 104 and the side surfaces 203 and 204 are along the short side of the display panel PNL.
- the display panel PNL may be formed in a rectangular shape extending in the second direction Y, in a square shape, in another polygonal shape, or in another shape such as a circular shape or an elliptical shape. It may be formed into a shape.
- the wiring board 1 and the IC chip 2 are mounted on the extension portion Ex.
- the wiring board 1 is, for example, a bendable flexible printed circuit board.
- the IC chip 2 has a built-in display driver or the like that outputs a signal necessary for displaying an image, for example.
- the IC chip 2 may be mounted on the wiring board 1.
- a plurality of wiring boards 1 arranged in the first direction X are mounted on the display panel PNL, but a single wiring board 1 extending in the first direction X is mounted. May be good.
- a plurality of IC chips 2 arranged in the first direction X are mounted on the display panel PNL, a single IC chip 2 extending in the first direction X may be mounted.
- the light emitting module 100 is superposed on the extending portion Ex and arranged along the side surface 201 of the second transparent substrate 20 in a plan view.
- the seal SE adheres the first substrate SUB1 and the second substrate SUB2. Further, the seal SE is formed in a rectangular frame shape, and surrounds the liquid crystal layer LC between the first substrate SUB1 and the second substrate SUB2. Such a seal SE faces the first portion SE1, the second portion SE2 facing the first portion SE1 with the liquid crystal layer LC interposed therebetween, the third portion SE3, and the third portion SE3 with the liquid crystal layer LC interposed therebetween. It has a fourth portion SE4 and the like.
- the first portion SE1 and the second portion SE2 extend along the first direction X.
- the third portion SE3 and the fourth portion SE4 extend along the second direction Y and connect the first portion SE1 and the second portion SE2.
- the seal SE has an injection port SI formed in the second portion SE2 and a filler SF filled in the injection port SI.
- the inlet SI is a liquid crystal inlet for injecting a liquid crystal material.
- the liquid crystal layer LC is held between the first substrate SUB1 and the second substrate SUB2. Such a liquid crystal layer LC is arranged in the display region DA in a plan view. Further, the liquid crystal layer LC is a non-display region around the display region DA, that is, a first region A1 between the display region DA and the first portion SE1, and a second region between the display region DA and the second portion SE2. It is arranged over the region A2, the third region A3 between the display region DA and the third portion SE3, and the fourth region A4 between the display region DA and the fourth portion SE4.
- the first region A1 is formed wider than any of the second region A2, the third region A3, and the fourth region A4. That is, the first region A1 has a width (first width) W1 between the first portion SE1 and the display region DA along the second direction Y, and the second region A2 has the second portion SE2 and the display region DA. Has a width (second width) W2 along the second direction Y between the third region A3 and a width (third) along the first direction X between the third portion SE3 and the display area DA.
- the fourth region A4 has a width (fourth width) W4 along the first direction X between the fourth portion SE4 and the display region DA.
- the first width W1 is larger than the second width W2 (W1> W2). Further, the first width W1 is larger than any of the third width W3 and the fourth width W4 (W1> W3, W1> W4).
- the liquid crystal layer LC contains a polymer 31 and a liquid crystal molecule 32.
- the polymer 31 is a liquid crystal polymer.
- the polymer 31 is formed in a streak extending along the first direction X and is aligned in the second direction Y.
- the liquid crystal molecules 32 are dispersed in the gaps of the polymer 31, and the long axis thereof is oriented along the first direction X.
- Each of the polymer 31 and the liquid crystal molecule 32 has optical anisotropy or refractive index anisotropy.
- the responsiveness of the polymer 31 to the electric field is lower than the responsiveness of the liquid crystal molecule 32 to the electric field.
- the orientation direction of the polymer 31 hardly changes regardless of the presence or absence of an electric field.
- the orientation direction of the liquid crystal molecules 32 changes according to the electric field when a voltage higher than the threshold value is applied to the liquid crystal layer LC.
- the optical axes of the polymer 31 and the liquid crystal molecules 32 are substantially parallel to each other, and the light incident on the liquid crystal layer LC almost all of the liquid crystal layer LC.
- Transparent transparent state.
- the orientation direction of the liquid crystal molecules 32 changes, and the optical axes of the polymer 31 and the liquid crystal molecules 32 intersect with each other. Therefore, the light incident on the liquid crystal layer LC is scattered in the liquid crystal layer LC (scattered state).
- FIG. 2 is a plan view of a region including the first region A1 shown in FIG.
- the light emitting module 100 includes a plurality of light emitting elements 110 and a light guide body 120.
- the plurality of light emitting elements 110 are arranged along the first direction X.
- the light guide body 120 is formed in the shape of an extended rod in the first direction X.
- the light guide body 120 is located between the first portion SE1 of the seal and the light emitting element 110.
- the display area DA includes a plurality of pixels PX arranged in a matrix in the first direction X and the second direction Y.
- the first region A1 includes a plurality of dummy pixel DPs arranged in a matrix in the first direction X and the second direction Y. These pixel PX and dummy pixel DP are shown by dotted lines in the figure. Further, each of the pixel PX and the dummy pixel DP includes a pixel electrode PE shown by a solid square in the figure.
- the pixel electrode included in each pixel PX is referred to as a first pixel electrode PE1
- the pixel electrode included in the dummy pixel DP is referred to as a second pixel electrode PE2.
- 5 to 20 dummy pixel DPs are arranged between the first portion SE1 and the display region DA along the second direction Y.
- the first width W1 of the first region A1 can be defined as the length between the first pixel electrode PE1 and the first portion SE1 of the outermost pixel PXE in the display region DA.
- each pixel PX includes a switching element SW.
- the switching element SW is composed of, for example, a thin film transistor (TFT), and is electrically connected to the scanning line G and the signal line S.
- the scanning line G is electrically connected to the switching element SW in each of the pixels PX arranged in the first direction X.
- the signal line S is electrically connected to the switching element SW in each of the pixels PX arranged in the second direction Y.
- the first pixel electrode PE1 is electrically connected to the switching element SW.
- the common electrode CE and the feeder line CL are arranged over the display area DA and the first area A1.
- a predetermined voltage Vcom is applied to the common electrode CE.
- a voltage having the same potential as the common electrode CE is applied to the feeder line CL.
- Each of the first pixel electrodes PE1 faces the common electrode CE in the third direction Z.
- the liquid crystal layer LC (particularly, the liquid crystal molecules 32) is driven by an electric field generated between the first pixel electrode PE1 and the common electrode CE.
- the capacitance CS is formed, for example, between the feeder line CL and the first pixel electrode PE1.
- the second pixel electrode PE2 is electrically connected to the feeder line CL.
- Each of the second pixel electrodes PE2 faces the common electrode CE in the third direction Z.
- the potential of the second pixel electrode PE2 is the same as the potential of the common electrode CE, an electric field for driving the liquid crystal layer LC is not generated in the first region A1.
- the scanning line G, the signal line S, the feeder line CL, the switching element SW, the first pixel electrode PE1 and the second pixel electrode PE2 are provided on the first substrate SUB1, and the common electrode CE is the first. 2 It is provided on the substrate SUB2.
- FIG. 3 is a plan view of a region including the second region A2 shown in FIG. A dummy pixel DP like the first region A1 is not arranged in the second region A2. That is, no pixel electrode is arranged between the first pixel electrode PE1 of the outermost pixel PXE in the display area DA and the second portion SE2 of the seal.
- the second width W2 of the second region A2 can be defined as the length between the first pixel electrode PE1 and the second portion SE2 of the outermost pixel PXE in the display region DA.
- FIG. 4 is a plan view of a region including the third region A3 and the fourth region A4 shown in FIG. Dummy pixel DP like the first region A1 is not arranged in the third region A3 and the fourth region A4. That is, in the display area DA, between the first pixel electrode PE1 of the outermost pixel PXE on the left side of the figure and the third portion SE3 of the seal, and the first pixel electrode of the outermost pixel PXE on the right side of the figure. No pixel electrode is arranged between PE1 and the fourth portion SE4 of the seal.
- the third width W3 of the third region A3 can be defined as the length between the first pixel electrode PE1 and the third portion SE3 of the outermost pixel PXE in the display region DA.
- the fourth width W4 of the fourth region A4 can be defined as the length between the first pixel electrode PE1 and the fourth portion SE4 of the outermost pixel PXE in the display region DA.
- the plurality of scanning lines G extend along the first direction X in the display area DA, and are arranged in the second direction Y at intervals.
- the odd-numbered scanning line GA among the plurality of scanning lines G is drawn out to the third region A3, and the even-numbered scanning line GB is drawn out to the fourth region A4.
- FIG. 5 is a plan view showing an example of the pixel PX. Here, only a part of the configurations included in the first substrate SUB1 are shown.
- the first substrate SUB1 includes a plurality of scanning lines G, a plurality of signal lines S, a switching element SW, a feeder line CL, a metal wire ML, and an insulating film IL.
- the plurality of scanning lines G each extend in the first direction X.
- Each of the plurality of signal lines S extends in the second direction Y and intersects the plurality of scanning lines G.
- the pixel PX corresponds to a region defined by two adjacent scanning lines G and two adjacent signal lines S.
- the switching element SW is arranged at the intersection of the scanning line G and the signal line S.
- the insulating film IL is formed in a grid pattern that defines the opening OP in each pixel PX.
- the insulating film IL is, for example, an organic insulating film.
- the insulating film IL is superimposed on the scanning line G, the signal line S, and the switching element SW, respectively.
- the drain electrode DE of the switching element SW extends to the opening OP.
- the connection electrode CN1 is formed in an island shape, is located at the opening OP, and is electrically connected to one end of the drain electrode DE.
- the feeder line CL is arranged on the insulating film IL and is formed in a grid pattern surrounding the pixel PX.
- the feeder line CL is separated from the connection electrode CN1.
- the opening OPC of the feeder line CL is superimposed on the opening OP of the insulating film IL.
- the metal wire ML is arranged on the feeder line CL and is formed in a grid pattern surrounding the pixel PX.
- the feeder line CL and the metal wire ML are superimposed on the scanning line G, the signal line S, and the switching element SW, respectively.
- FIG. 6 is a plan view showing an example of the first pixel electrode PE1 arranged in the pixel PX shown in FIG.
- the first pixel electrode PE1 indicated by the alternate long and short dash line is superimposed on the opening OPC of the feeder line CL. Further, the peripheral edge of the first pixel electrode PE1 is superimposed on the feeder line CL.
- An insulating film is interposed between the first pixel electrode PE1 and the feeder line CL, and the capacitance CS shown in FIG. 2 is formed between the peripheral edge of the first pixel electrode PE1 and the feeder line CL. ..
- the first pixel electrode PE1 is superimposed on the connection electrode CN1 in the opening OPC.
- a contact hole CH1 is formed in the insulating film interposed between the first pixel electrode PE1 and the connection electrode CN1.
- the first pixel electrode PE1 is in contact with the connection electrode CN1 in the contact hole CH1.
- the first pixel electrode PE1 is electrically connected to the switching element SW.
- FIG. 6 shows a light-shielding layer BM provided on the second substrate SUB2 with a dotted line.
- the light-shielding layer BM is formed in a grid pattern and is superimposed on the feeder line CL, the switching element SW, the connection electrode CN1, and the like in a plan view.
- the light-shielding layer BM is also superimposed on the scanning line G, the signal line S, and the metal line ML shown in FIG.
- the light-shielding layer BM has an opening AP1 that overlaps with the first pixel electrode PE1 in a plan view.
- FIG. 7 is a plan view showing an example of the switching element SW shown in FIG.
- the switching element SW includes a semiconductor SC, a gate electrode GE integrated with the scanning line G, a source electrode SO integrated with the signal line S, a drain electrode DE, and an auxiliary gate electrode AG.
- the feeder line CL indicated by the alternate long and short dash line is superimposed on the switching element SW.
- the semiconductor SC is, for example, an oxide semiconductor, but may be polycrystalline silicon or amorphous silicon.
- the three semiconductor SCs are superimposed on the gate electrode GE and are arranged along the second direction Y at intervals.
- the auxiliary gate electrode AG is superimposed on the gate electrode GE and the semiconductor SC. Further, the auxiliary gate electrode AG is superimposed on the scanning line G.
- a connection electrode CN2 is interposed between the scanning line G and the auxiliary gate electrode AG.
- a contact hole CH21 is formed in the insulating film interposed between the scanning line G and the connection electrode CN2.
- the connection electrode CN2 is in contact with the scanning line G in the contact hole CH21.
- a contact hole CH22 is formed in the insulating film interposed between the connection electrode CN2 and the auxiliary gate electrode AG.
- the auxiliary gate electrode AG is in contact with the connection electrode CN2 in the contact hole CH22. As a result, the auxiliary gate electrode AG is electrically connected to the scanning line G in the same manner as the gate electrode GE.
- the source electrode SO and the drain electrode DE are arranged along the first direction X at intervals.
- the source electrode SO is in contact with one end side of each of the semiconductor SCs.
- the drain electrode DE is in contact with the other end side of each of the semiconductor SCs.
- connection electrode CN3 One end of the drain electrode DE is superimposed on the connection electrode CN3.
- a contact hole CH3 is formed in the insulating film interposed between the drain electrode DE and the connection electrode CN3.
- the drain electrode DE is in contact with the connection electrode CN3 in the contact hole CH3.
- the connecting electrode CN1 indicated by the alternate long and short dash line is in contact with the connecting electrode CN3.
- the connection electrode CN1 is electrically connected to the switching element SW, and is electrically connected to the first pixel electrode PE1 shown in FIG. 6 in the contact hole CH1.
- FIG. 8 is a cross-sectional view showing an example of the first substrate SUB1 along the line AB shown in FIG. 7.
- the first substrate SUB1 includes a first transparent substrate 10, insulating films 11 to 13, insulating films IL, a switching element SW, a feeder line CL, a metal wire ML, and a first pixel electrode PE1. There is.
- the gate electrode GE integrated with the scanning line G is arranged on the first transparent substrate 10.
- the insulating film 11 covers the first transparent substrate 10 and the gate electrode GE.
- the semiconductor SC is arranged on the insulating film 11 and is located directly above the gate electrode GE.
- the source electrode SO and the drain electrode DE integrated with the signal line S are arranged on the insulating film 11 and are in contact with the semiconductor SC, respectively. These source electrode SO and drain electrode DE are made of the same material.
- the insulating film 12 covers the insulating film 11, the source electrode SO, and the drain electrode DE. Further, the insulating film 12 is in contact with the semiconductor SC between the source electrode SO and the drain electrode DE.
- the auxiliary gate electrode AG is arranged on the insulating film 12 and is located directly above the gate electrode GE and the semiconductor SC.
- the connection electrode CN3 is arranged on the insulating film 12 and is in contact with the drain electrode DE in the contact hole CH3 formed in the insulating film 12.
- the auxiliary gate electrode AG and the connection electrode CN3 are made of the same material.
- the insulating film IL covers the auxiliary gate electrode AG.
- the connection electrode CN3 is located at the opening OP and is exposed from the insulating film IL.
- the feeder line CL is arranged on the insulating film IL.
- the connection electrode CN1 is arranged on the connection electrode CN3 in the opening OP and is in contact with the connection electrode CN3.
- the feeder line CL and the connection electrode CN1 are made of the same material.
- the metal wire ML is arranged on the feeder line CL and is in contact with the feeder line CL.
- the insulating film 13 covers the feeder line CL, the metal wire ML, and the connection electrode CN1. Further, the insulating film 13 is in contact with the insulating film 12 between the feeder line CL and the connection electrode CN1.
- the first pixel electrode PE1 is arranged on the insulating film 13 and is in contact with the connection electrode CN1 in the contact hole CH1 formed in the insulating film 13. The peripheral edge of the first pixel electrode PE1 faces the feeder line CL and the metal wire ML via the insulating film 13.
- the insulating films 11 to 13 are transparent inorganic insulating films such as silicon oxide, silicon nitride, and silicon oxynitride.
- the insulating film IL is a transparent organic insulating film such as an acrylic resin.
- the feeder line CL, the connection electrode CN1, and the first pixel electrode PE1 are transparent electrodes formed of a transparent conductive material such as indium tin oxide (ITO) or indium zinc oxide (IZO).
- FIG. 9 is a cross-sectional view showing an example of the first substrate SUB1 along the CD line shown in FIG. 7.
- the connection electrode CN2 is arranged on the insulating film 11 and is in contact with the scanning line G in the contact hole CH21 formed in the insulating film 11.
- the connection electrode CN2 is made of the same material as the source electrode SO and the drain electrode DE.
- the insulating film 12 covers the insulating film 11, the connection electrode CN2, the source electrode SO, and the drain electrode DE.
- the auxiliary gate electrode AG is arranged on the insulating film 12 and is in contact with the connection electrode CN2 in the contact hole CH 22 formed in the insulating film 12.
- FIG. 10 is a plan view showing an example of the dummy pixel DP.
- the feeder line CL is arranged on the insulating film IL and is formed in a grid pattern surrounding the dummy pixel DP.
- the metal wire ML is arranged on the feeder line CL and is formed in a grid pattern surrounding the dummy pixel DP.
- the feeder line CL and the metal wire ML are superimposed on the scanning line G, the signal line S, and the switching element SW, respectively.
- the dummy pixel DP shown in FIG. 10 is different from the pixel PX shown in FIG. 5 in that the feeder line CL has a protruding portion CLP protruding from the opening OP. That is, in the dummy pixel DP, the island-shaped connection electrode CN1 electrically connected to the switching element SW does not exist.
- FIG. 11 is a plan view showing an example of the second pixel electrode PE2 arranged in the dummy pixel DP shown in FIG.
- the second pixel electrode PE2 shown by the alternate long and short dash line is superimposed on the opening OPC of the feeder line CL. Further, the second pixel electrode PE2 is superimposed on the protruding portion CLP of the feeder line CL.
- a contact hole CH11 is formed in the insulating film interposed between the second pixel electrode PE2 and the protruding portion CLP. The second pixel electrode PE2 is in contact with the protruding portion CLP in the contact hole CH11. As a result, the second pixel electrode PE2 is not electrically connected to the switching element SW, but is electrically connected to the feeder line CL.
- FIG. 11 shows a light-shielding layer BM provided on the second substrate SUB2 with a dotted line.
- the light-shielding layer BM is formed in a grid pattern surrounding the dummy pixel DP, and is superimposed on the feeder line CL or the like including the protruding portion CLP in a plan view.
- the light-shielding layer BM has an opening AP2 that overlaps with the second pixel electrode PE2 in a plan view.
- the area of the opening AP2 is equivalent to the area of the opening AP1.
- FIG. 12 is a cross-sectional view of the first substrate SUB1 including the contact hole CH11 shown in FIG.
- the switching element SW is also arranged in the dummy pixel DP, but the switching element SW may be omitted.
- the drain electrode DE extends to just below the protruding portion CLP formed integrally with the feeder line CL, the drain electrode DE may be omitted.
- the protruding portion CLP is in contact with the connection electrode CN3, the connection electrode CN3 may be omitted.
- the insulating film 13 covers the protruding portion CLP.
- the second pixel electrode PE2 is arranged on the insulating film 13 and is in contact with the protruding portion CLP in the contact hole CH11 formed in the insulating film 13.
- FIG. 13 is a perspective view showing an example of the light emitting module 100 shown in FIG.
- the light emitting module 100 includes a wiring board F, an adhesive layer AD1, a plurality of light emitting elements 110, and a light guide body (prism lens) 120.
- the wiring board F is, for example, a bendable flexible printed circuit board.
- the plurality of light emitting elements 110 are arranged at intervals along the first direction X and are electrically connected to the wiring board F.
- the light emitting element 110 is, for example, a white light source that emits white light.
- the light guide body 120 is made of resin, for example, is formed in a transparent rod shape, and extends along the first direction X.
- the light guide body 120 is adhered to the wiring board F by the adhesive layer AD1.
- the plurality of light emitting elements 110 face the light guide body 120 in the second direction Y.
- FIG. 14 is a perspective view showing a state in which the light emitting module 100 shown in FIG. 13 is arranged on the display panel PNL.
- the light emitting element 110 is shown by a solid line
- the light guide body 120 is shown by a dotted line
- the display panel PNL is shown by a alternate long and short dash line
- the other members are not shown.
- the light emitting module 100 is arranged in the extension portion Ex.
- the light guide body 120 is arranged between the light emitting element 110 and the side surface 201.
- the light emitting element 110 has a light emitting unit EM facing the light guide body 120.
- the light emitted from the light emitting unit EM of each light emitting element 110 is incident on the light guide body 120.
- the light incident on the light guide body 120 is appropriately diffused in the light guide body 120 and is incident on the display panel PNL from the side surface 201.
- FIG. 15 is a plan view showing the state of propagation of the light emitted from the light emitting element 110.
- the light emitted from the adjacent light emitting elements 110 is incident on the light guide body 120, appropriately diffused by the light guide body 120, and then incident on the display panel PNL.
- the light from the adjacent light emitting element 110 is not sufficiently mixed, and a difference in brightness is likely to occur.
- the first width W1 of the first region A1 is set to have a size sufficient to mix the light from the adjacent light emitting elements 110. Therefore, in the display area DA, streak-like display unevenness due to light and darkness can be suppressed, and deterioration of display quality can be suppressed.
- the liquid crystal material injected from the injection port SI becomes less fluid as the distance from the injection port SI decreases, and it may be difficult to spread to the region in contact with the seal SE. Therefore, the diffusivity of the incident light differs between the region near the injection port SI and the region away from the injection port SI, which may be visually recognized as unevenness.
- the injection port SI is formed on the side opposite to the side on which the light emitting module 100 is arranged, with the display area DA interposed therebetween. Moreover, of the non-display regions where the liquid crystal layer LC is arranged, the first region A1 on the side opposite to the injection port SI is formed wider than the second region A2 in the vicinity of the injection port SI. Therefore, even if the liquid crystal material is difficult to spread in the first region A1, display unevenness of the image displayed in the display region DA can be suppressed, and deterioration of display quality can be suppressed.
- a dummy pixel DP configured in the same manner as the pixel PX of the display area DA is arranged, and moreover, it is arranged in the first pixel electrode PE1 and the dummy pixel DP arranged in the pixel PX.
- the second pixel electrode PE2 faces the openings AP1 and AP2 of the light-shielding layer BM, respectively. Therefore, even in the dummy pixel DP, light is transmitted in the same manner as the pixel PX, the transparency of the display panel PNL can be improved, and the appearance of the dummy pixel DP and the pixel PX can be made uniform.
- FIG. 16 is a cross-sectional view of the display device DSP. As for the display panel PNL, only the main part is shown in a simplified manner.
- the first pixel electrode PE1 in the display region DA and the second pixel electrode PE2 in the first region A1 are covered with the alignment film AL1.
- the light-shielding layer BM having the openings AP1 and AP2 is arranged on the inner surface 20A of the second transparent substrate 20.
- the opening AP1 faces the first pixel electrode PE1 in the third direction Z
- the opening AP2 faces the second pixel electrode PE2 in the third direction Z.
- the common electrode CE is arranged over the display region DA and the first region A1 and faces the first pixel electrode PE1 and the second pixel electrode PE2 in the third direction Z.
- the common electrode CE is covered with the alignment film AL2.
- the display panel PNL includes a third transparent substrate 30 in addition to the first substrate SUB1 and the second substrate SUB2.
- the inner surface 30A of the third transparent substrate 30 faces the outer surface 20B of the second transparent substrate 20 in the third direction Z.
- the adhesive layer AD adheres the second transparent substrate 20 and the third transparent substrate 30.
- the third transparent substrate 30 is, for example, a glass substrate, but may be an insulating substrate such as a plastic substrate.
- the third transparent substrate 30 has a refractive index equivalent to that of the first transparent substrate 10 and the second transparent substrate 20.
- the adhesive layer AD has a refractive index equivalent to that of each of the second transparent substrate 20 and the third transparent substrate 30.
- the side surface 301 of the third transparent substrate 30 is located directly above the side surface 201 of the second transparent substrate 20.
- the light emitting element 110 of the light emitting module 100 is provided between the first substrate SUB1 and the wiring board F in the third direction Z.
- the light guide body 120 is provided between the light emitting element 110 and the side surface 201 and between the light emitting element 110 and the side surface 301 in the second direction Y.
- the light guide body 120 is adhered to the wiring board F by the adhesive layer AD1 and is adhered to the first substrate SUB1 by the adhesive layer AD2.
- the light emitting element 110 emits light L1 toward the light guide body 120.
- the light L1 emitted from the light emitting element 110 propagates along the direction of the arrow indicating the second direction Y, passes through the light guide body 120, is incident on the second transparent substrate 20 from the side surface 201, and is incident on the second transparent substrate 20 from the side surface 301. 3 It is incident on the transparent substrate 30.
- the light L1 incident on the second transparent substrate 20 and the third transparent substrate 30 propagates inside the display panel PNL while being repeatedly reflected.
- Each pixel PX in the display area DA can switch between a state in which a voltage is not applied to the liquid crystal layer LC (transparent state) and a state in which a voltage is applied to the liquid crystal layer LC (scattering state).
- the dummy pixel DP in the first region A1 is held in a state in which no voltage is applied to the liquid crystal layer LC (transparent state).
- Such a display device DSP can be observed from the outer surface 10A side of the first transparent substrate 10 and also from the outer surface 30B side of the third transparent substrate 30. Further, the background of the display device DSP can be observed via the display device DSP regardless of whether the display device DSP is observed from the outer surface 10A side or the outer surface 30B side.
- DSP ... Display device PNL ... Display panel DA ... Display area PX ... Pixel A1 ... 1st area DP ... Dummy pixel A2 ... 2nd area SUB1 ... 1st substrate 10 ... 1st transparent substrate PE1 ... 1st pixel electrode PE2 ... 2nd Pixel electrode CL ... Feed line SW ... Switching element SUB2 ... Second substrate 20 ... Second transparent substrate CE ... Common electrode LC ... Liquid crystal layer 30 ... Third transparent substrate 100 ... Light emitting module 110 ... Light emitting element
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Abstract
Description
表示装置は、第1透明基板と、前記第1透明基板の上に配置された複数の画素電極と、を備えた第1基板と、側面を有する第2透明基板と、前記複数の画素電極に対向する共通電極と、を備えた第2基板と、矩形枠状に形成され、前記第1基板及び前記第2基板を接着するシールと、前記第1基板と前記第2基板との間において前記シールによって囲まれ、高分子分散型液晶を含む液晶層と、前記側面に沿って配置された発光モジュールと、を備え、前記シールは、前記側面に沿った第1部分と、前記液晶層を挟んで前記第1部分に対向する第2部分と、前記第2部分に形成された注入口と、前記注入口に充填された充填材と、を有し、平面視において、前記液晶層は、画像を表示する表示領域と、前記表示領域と前記第1部分との間の第1領域と、前記表示領域と前記第2部分との間の第2領域と、に亘って配置され、前記第1領域の第1幅は、前記第2領域の幅より大きい。
第1幅W1は、第2幅W2より大きい(W1>W2)。
また、第1幅W1は、第3幅W3及び第4幅W4のいずれよりも大きい(W1>W3、W1>W4)。
第1基板SUB1は、複数の走査線Gと、複数の信号線Sと、スイッチング素子SWと、給電線CLと、金属線MLと、絶縁膜ILと、を備えている。
絶縁膜13は、突出部CLPを覆っている。第2画素電極PE2は、絶縁膜13の上に配置され、絶縁膜13に形成されたコンタクトホールCH11において、突出部CLPに接している。
配線基板Fは、例えば折り曲げ可能なフレキシブルプリント回路基板である。複数の発光素子110は、第1方向Xに沿って間隔をおいて並び、配線基板Fに電気的に接続されている。発光素子110は、例えば、白色光を出射する白色光源である。導光体120は、例えば樹脂製であり、透明な棒状に形成され、第1方向Xに沿って延出している。導光体120は、接着層AD1により配線基板Fに接着されている。複数の発光素子110は、第2方向Yにおいて導光体120と向かい合っている。
各発光素子110の発光部EMから出射された光は、導光体120に入射する。導光体120に入射した光は、導光体120において適度に拡散し、側面201から表示パネルPNLに入射する。
発光素子110は、導光体120に向かって光L1を出射する。発光素子110から出射された光L1は、第2方向Yを示す矢印の向きに沿って伝播し、導光体120を通り、側面201から第2透明基板20に入射するとともに、側面301から第3透明基板30に入射する。第2透明基板20及び第3透明基板30に入射した光L1は、繰り返し反射されながら、表示パネルPNLの内部を伝播する。
DA…表示領域 PX…画素 A1…第1領域 DP…ダミー画素 A2…第2領域
SUB1…第1基板 10…第1透明基板 PE1…第1画素電極 PE2…第2画素電極 CL…給電線 SW…スイッチング素子
SUB2…第2基板 20…第2透明基板 CE…共通電極
LC…液晶層 30…第3透明基板
100…発光モジュール 110…発光素子
Claims (5)
- 第1透明基板と、前記第1透明基板の上に配置された複数の画素電極と、を備えた第1基板と、
側面を有する第2透明基板と、前記複数の画素電極に対向する共通電極と、を備えた第2基板と、
矩形枠状に形成され、前記第1基板及び前記第2基板を接着するシールと、
前記第1基板と前記第2基板との間において前記シールによって囲まれ、高分子分散型液晶を含む液晶層と、
前記側面に沿って配置された発光モジュールと、を備え、
前記シールは、前記側面に沿った第1部分と、前記液晶層を挟んで前記第1部分に対向する第2部分と、前記第2部分に形成された注入口と、前記注入口に充填された充填材と、を有し、
平面視において、前記液晶層は、画像を表示する表示領域と、前記表示領域と前記第1部分との間の第1領域と、前記表示領域と前記第2部分との間の第2領域と、に亘って配置され、
前記第1領域の第1幅は、前記第2領域の幅より大きい、表示装置。 - 前記第1基板は、前記表示領域に配置されたスイッチング素子と、前記第1領域に配置され前記共通電極と同電位の給電線と、を備え、
前記複数の画素電極は、前記表示領域に配置された第1画素電極と、前記第1領域に配置された第2画素電極と、を含み、
前記第1画素電極は、前記スイッチング素子と電気的に接続され、
前記第2画素電極は、前記給電線と電気的に接続されている、請求項1に記載の表示装置。 - 前記第2基板は、遮光層を備え、
前記遮光層は、前記第1画素電極、及び、前記第2画素電極とそれぞれ対向する開口を有している、請求項2に記載の表示装置。 - 前記シールは、さらに、第3部分と、前記液晶層を挟んで前記第3部分と対向する第4部分と、を有し、
前記第3部分及び前記第4部分の各々は、前記第1部分と前記第2部分とを接続し、
平面視において、前記液晶層は、さらに、前記表示領域と前記第3部分との間の第3領域、及び、前記表示領域と前記第4部分との間の第4領域に亘って配置され、
前記第1幅は、前記第3領域の幅、及び、前記第4領域の幅より大きい、請求項1に記載の表示装置。 - 前記画素電極は、前記第2領域、前記第3領域、及び、前記第4領域には配置されていない、請求項4に記載の表示装置。
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EP21919554.2A EP4279986A4 (en) | 2021-01-14 | 2021-11-17 | DISPLAY DEVICE |
JP2022575096A JP7447316B2 (ja) | 2021-01-14 | 2021-11-17 | 表示装置 |
CN202180090502.6A CN116745693A (zh) | 2021-01-14 | 2021-11-17 | 显示装置 |
US18/350,797 US11988915B2 (en) | 2021-01-14 | 2023-07-12 | Display device |
JP2024026470A JP2024057027A (ja) | 2021-01-14 | 2024-02-26 | 表示装置 |
US18/638,803 US12242149B2 (en) | 2021-01-14 | 2024-04-18 | Display device |
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